We demonstrate a scheme for correcting the angular dispersion of the 3.1-<inline-formula><tex-math notation="LaTeX"> \mu</tex-math></inline-formula>m idler beam from a high repetition rate, KTiOAsO<inline-formula> <tex-math notation="LaTeX">_4</tex-math></inline-formula> (KTA) based noncollinear optical parametric amplifier pumped at 1.03 <inline-formula><tex-math notation="LaTeX">\mu</tex-math></inline-formula>m and seeded by broadband signal pulses at 1.55 <inline-formula><tex-math notation="LaTeX">\mu</tex-math></inline-formula>m. Following angular dispersion correction, successful temporal chirp compensation was possible, and a close to transform-limited pulse duration of 70 fs and a pulse energy of 30 <inline-formula><tex-math notation="LaTeX"> \mu</tex-math></inline-formula>J at a repetition rate of 100 kHz were obtained. The angular chirp compensated KTA-based scheme is scalable to higher pulse energies and average powers and has various advantages compared to periodically poled and angle-tuned LiNbO<inline-formula><tex-math notation="LaTeX">_3</tex-math></inline-formula> -based amplifiers, which exhibit low resistance to photorefractive damage.